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[YAMAMOTO Takashi <yamamoto@xxxxxxxxxxxxx>]

an example of the failure:
http://172.17.16.18/ryuci/14/139914/1/check/check-tempest-dsvm-ofagent/ad71969/

relevant ovs log:
> > 2014-12-09T00:00:56.384Z|00024|bridge|INFO|bridge br-int: added interface qvoa0effc8a-2c on port 8
> > 2014-12-09T00:01:27.467Z|00027|bridge|INFO|bridge br-int: added interface qvoa0effc8a-2c on port 11


** Tags added: openflowagent

** Description changed:

  tempest test_server_connectivity_rebuild occasionally fail with ofagent.
  
  it turned out to be a problem in port monitoring.
  when a port is removed and then recreated with the same name in an agent's polling interval,
  it can miss the update and failed to update the corresponding flows.
  
- note1: that the switch might choose a different ofport number for the recreated port.
+ note1: the switch might choose a different ofport number for the recreated port.
  note2: it isn't a problem for OVS-agent because it uses NORMAL action and doesn't have flows for a specific ofport.

** Description changed:

  tempest test_server_connectivity_rebuild occasionally fail with ofagent.
  
  it turned out to be a problem in port monitoring.
  when a port is removed and then recreated with the same name in an agent's polling interval,
  it can miss the update and failed to update the corresponding flows.
  
- note1: the switch might choose a different ofport number for the recreated port.
+ note1: flow updates are necessary because the switch is free to choose a different ofport number for the recreated port.
  note2: it isn't a problem for OVS-agent because it uses NORMAL action and doesn't have flows for a specific ofport.

** Also affects: neutron
   Importance: Undecided
       Status: New

** Summary changed:

- occasional test_server_connectivity_rebuild failure
+ ofagent: occasional test_server_connectivity_rebuild failure

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https://bugs.launchpad.net/bugs/1435638

Title:
  ofagent: occasional test_server_connectivity_rebuild failure

Status in OpenStack Networking ofagent driver and its agent:
  New
Status in OpenStack Neutron (virtual network service):
  New

Bug description:
  tempest test_server_connectivity_rebuild occasionally fail with
  ofagent.

  it turned out to be a problem in port monitoring.
  when a port is removed and then recreated with the same name in an agent's polling interval,
  it can miss the update and failed to update the corresponding flows.

  note1: flow updates are necessary because the switch is free to choose a different ofport number for the recreated port.
  note2: it isn't a problem for OVS-agent because it uses NORMAL action and doesn't have flows for a specific ofport.

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